1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
jasenka [17]
3 years ago
7

Here we will calculate the work per unit charge on an electron moving between two potentials. A 9.0 V battery is connected acros

s two large parallel plates that are separated by 4.5 mm of air, creating a potential difference of 9.0 V between the plates. (a) What is the electric field in the region between the plates? (b) An electron is released from rest at the negative plate. If the only force on the electron is the electric force exerted by the electric field of the plates, what is the speed of the electron as it reaches the positive plate? The mass of an electron is me=9.11×10−31kg.
Physics
1 answer:
Svet_ta [14]3 years ago
4 0

Answer:

2000 V/m

1778021.69323 m/s

Explanation:

V = Voltage = 9 V = \Delta V

q = Charge of proton = 1.6\times 10^{-19}\ C

m = Mass of electron = 9.11\times 10^{-31}\ kg

v = Velocity of electron

Electric field is given by

E=\dfrac{V}{d}\\\Rightarrow E=\dfrac{9}{4.5\times 10^{-3}}\\\Rightarrow E=2000\ V/m

The electric field is 2000 V/m

Here, the energy of the system is conserved

\dfrac{1}{2}mv^2=q\Delta V\\\Rightarrow v=\sqrt{\dfrac{2q\Delta V}{m}}\\\Rightarrow v=\sqrt{\dfrac{2\times 1.6\times 10^{-19}\times 9}{9.11\times 10^{-31}}}\\\Rightarrow v=1778021.69323\ m/s

The velocity of the electron is 1778021.69323 m/s

You might be interested in
What is the difference between a tide and a wave.please answer.
Sedbober [7]

Answer:Tides are formed because of the interaction of the gravitational forces between the Earth, the moon, and the sun. ... Tides are made by the rising and falling sea levels with the action of gravity while waves are formed when several factors relating to the wind and water interact with each other

3 0
3 years ago
A force of magnitude 33.73 lb directed toward the right is exerted on an object. What other force must be applied to the object
vova2212 [387]

Answer:

33.73 lb to the left

Explanation:

You need to exert a force with the same magnitude, but opposite direction. You can visualize it in this way: When you push an object, the object will follow your path, but if there is another person opposing the force you are exerting, the object will just not move. If the force that the other person exerts were higher, then the object would move in the opposite direction. So, you need them to have the same magnitude.

7 0
3 years ago
3. A particle of charge +7.5 µC is released from rest at the point x = 60 cm on an x-axis. The particle begins to move due to th
Fed [463]

Answer:

HSBC keen vs kg get it yyyyyuuy

Explanation:

hgccccxfcffgbbbbbbbbbbghhyhhhgdghcjyddhhyfdghhhfdgbxbbndgnncvbhcxgnjffccggshgdggjhddh

nnnbvvvvvggfxrugdfutdfjhyfggigftffghhjjhhjyhrdffddfvvvvvvvvvvvbbbbbbbbbvvcxccghhyhhhjjjhjnnnnnnnnnnnnnbhbfgjgfhhccccccvvjjfdbngxvncnccbnxcvbchvxxghfdgvvhhihbvhbbhhvxcgbbbcxzxvbjhcxvvbnnxvnn

3 0
3 years ago
If you are behind other vehicles, use low beams when you are within __________ feet of the vehicle ahead.
PilotLPTM [1.2K]
300 Hope this helps :)
5 0
3 years ago
Give an example of a situation in which there is a force and a displacement, but the force does no work. explain why it does no
makkiz [27]
Work is equal to force times distance times cosine of the angle between the force and the path vector making it a scalar or dot product. Work is independent of the path taken. It refers to positive change in KE or negative change in PE.
 So for example if you lift a box from ground to waist height then, you did positive work over the distance you lifted it. If you pick it up to that same height, then put it back done on the ground at same place, then no work is done. 

Hope this makes sense. Any questions please ask. Thank You!
6 0
3 years ago
Read 2 more answers
Other questions:
  • In a Brinell hardness test, a 1500-kg load is pressed into a specimen using a 10-mm-diameter hardened steel ball. The resulting
    14·1 answer
  • Ignoring air resistance, if you throw a baseball from first base upwards toward a friend in left field, and the baseball leaves
    5·2 answers
  • At target prctice, Scott holds his bow and pulls the arrowback
    7·1 answer
  • If you exert a force of 51 n to walk 6 m up a flight of stairs in 9 seconds, how much power do you use? answer in units of w.
    15·1 answer
  • Medical imaging would be best suited for which situation(s)?
    13·2 answers
  • Descending into earth’s interior, temperature, as well as pressure on rock, _____.
    9·2 answers
  • A bucket filled with water has a mass of 70kg and is hanging from a rope that is wound around a 0.054 m radius stationary cylind
    11·1 answer
  • Determine the inductance of a solenoid with 650 turns in a length of 28 cm . The circular cross section of the solenoid has a ra
    6·1 answer
  • This is the question<br> please help asap
    11·1 answer
  • The relationship between power, force, and velocity is ______?
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!